viperuste

Could you clarify what "viperuste" refers to? I’m not finding a widely recognized, single definition for this term. It could be a Finnish or Estonian word, a product or project name, a company, a concept in a specific field, or something fictional. If you can provide a bit of context, a link, or specify the intended meaning, I can write a concise, neutral wiki-style article under 300 words. If you’d like, I can also produce a disambiguation-style stub that outlines multiple plausible meanings.